A pregnancy test performed on the same date as a preventive service may be reported separately using the CPT code appropriate to the test (e.g., 81025, âUrine pregnancy test, by visual color comparison methodsâ) and a diagnosis code from the V72.4X series (pregnancy examination or test).
This process is called continental drift. The plates move because of convection currents in the Earth's mantle. These are driven by the heat produced by the decay of radioactive elements and heat left over from the formation of the Earth.
As the oozy mantle surges below, it carries the plates along, crashing them into each other in some spots, and pulling them apart in other regions. But scientists were at a loss to explain why some pieces of crust move much faster than others. A new study suggests these tectonic plates control their